Container closure



' Feb. 5, 1946. M. E. BAAR CONTAINER CLOSURE Filed Dec. 24, 1942 Patented Feb. 5, 1946 UNITED Y s-urns PATENT OFFICE] CLOSURE Max E. Baar, Canton, Ohio H Application December 24, 1942, Serial No. 469,979 4 Claims. (c1. 215-43) spaced recesses in which are mounted inserts of The invention relates to closures for containers such as bottles, jars and the like,an d more par ticularly to a container closure provided with a peripheral insert or insert of friction material to be gripped by the fingers for facilitating the removal of the closure from the container.

The object of the invention is to provide means for easily removing a screw-threaded cap, or the like from bottles, jars and other containers.

It is another object of the invention to provide a container closure having one or more recesses in its peripheral portion with friction material inserted therein. 7

Another object is the provision of a container closure provided with a peripheral groove and having a band of friction material located in said groove.

A further object is the provision of such a con-' tainer closure in which a band of rubber is located under tension in said groove. I

A still further object is the provision of a container closure of the character above referred to in which a band of friction material is molded into said groove.

Another object of the invention is to provide a friction material; and a Fig. 8, atransverse sectional view th'rough a container closure having a recess or groove extending partially around each side thereof and an insert of friction material locatedineach recess.

Similar numerals refer to similarv parts throughout the drawing. v The container closure indicated generally at lll'may be formed of any suitable material such cesses around its periphery and inserts of friction material mounted in said recesses.

The above, together with other objects which will be apparent from the drawing and following description, or which may be laterreferred to,

may be attained by constructing the-improved container closure in the manner illustrated in the accompanying drawing, in which- Figure 1 is a perspective view of a container closure constructed in accordance with the invention, a rubber band being located in a peripheral groove in the closure;

Fig. 2, a perspective view of the improved container closure before the friction band has been applied thereto;

Fig. 3, a vertical sectional view of the container closure shown in Fig. 1;

Fig. 4, a detached perspective view of a rubber as metal, hard rubber, plastic materialssuch as cellulose acetates. phenol formaldehyde orjsynthetic resins or other suitable material.

This container closure or cap is adapted for use I upon bottles. jars and other containers forvaria ous kinds of products and may bed the general construction and arrangement commonly used in j closures of this general character. v

Such closures are generally of hollow cylindric form provided with a closed top wall II and in-' ternal screw-threads l2 or other means by which i the closure is attached to the neck of the bottle'or other container upon which it is used.

The present invention therefore contemplates the provision of means upon the exterior of the container closure to provide a friction grip for the fingers so that the closure may be easily unscrewed from the container.

In order to provide this friction surface a pcripheral recess or groove l3 of substantial width may be formed around the exterior of the container closure as shown in Fig. 2, this groove being formed when the closure i molded, cast or otherwise formed so that no extra operation is necessary to produce the groove.

A band or ring of suitable friction material is then placed in the groove l3 filling the same and providing the friction surface to be gripped by the fingers for removing the closure from the container.

As shown in Figs. 1, 3 and 4, this ring of friction material may be in the form of a rubber band l4 of substantially the width of the groove l3 and preferably of considerably less diameter It is frequently necessary that these closures 1 within the groove 13. If desired this felasticrub? 1o vber band may be cemented to the outer surface of the closure, within the groove I3, as indi cated at l6. Z

As shown in Figs. 5 andr6 the frictiongripping; surface may be produced by molding a band 1 1 within the groove l3, this band being molded-of any suitable friction material such hardzrubher or plastic material having sand, emery dust. or other similar material impregnated'therein" soas to-produce a. friction surface .as indicated; at late be gripped by the fingersrforu'nscrewing the cap from. the container. V As shown .in ,Figslll and l8 thelinventionl may be carriedfout by providing a plurality of spaced recesses-around the periphery offthe' cap and locatinginserts' of friction material in said re;

cesses. u In'Fig'. 7 'is shown acontainerlclosure''lil having a .multiplicity of spaced (recesses-I3 formed. in its periphery, inserts Il of friction; materialfbeing Iocatedin said recesses so that they. may be engaged 'by .the fingers andjthumb for unscrewing the .capIfrom the container;-

Another modification, is shown in :Figi'f. 8, "in which .thecap 10 isprovidd with a recess in l i groove f'l 3P extending, partially aroundeach side.

of -thelc'ap,'.inserts ll", of friction material; being} locatedin said recesses in position to hev engaged v by thefingers to' remove the capfromithe con tainer. V -40 The plastic, friotionimaterial' as shown in Figs. 5 to=8 maybe molded intothe'groovesfor .re-I. cesses in the cap in-.;any usual or well known manner, or the recessed. cap may be imrnersed in plastic friction material -so as to fill the recesses therewith, andthe surplus friction. material 'rria'ybe wipediorscraped, or otherwiseremoved from thesurface. of the cap v r Although an ordinaryscrew threadis shown. upon .thelinterior of the-.containerclosure it' should be understood that the particular'type of means for.-attaching the closure to the container does not in itself form any part of the invention, as various common variations of threads such as a partial thread or a bayonet look, as used on many container closures, may be used, or the closure may be otherwise attached to the container, the invention residing in the friction means upon the outside of any cap of this general type to assist'in turning or unscrewing the cap fro n the container. s 1 V -Erornthe'above it will lie-evident that a simple, inexpensive andefficieri't means is provided for producing a friction surface around the exterior of a container closure to facilitate easy removal .1.th fe f .from the container.

' I. A closure for a container having a neck, said rclosure comprising a unitary, integral, molded surrounding ea'ch recess, and -inser ts; of plastic friction material impregnated with gritmolded insaidrecesses. 1 V

2; A closure for a container having a neck,.said closure Qcoinprising a unitary, integral, molded cap internallyshaped to engage a neck of a contairiei, said cap having a recess in its; outer surface extendinglonly partially around the periphery of thecap, integralwalls entirely surrounding the recess, and aninsertof plastic friction material. impregnated with grit ;molded a in 7 said recess.

. 3.:A closure for a container having external screw means, said closure comprising a unitary,

integral, molded cap having internal screw means toengage an external screw means uponaconrecesses in its outer surface; integral walls entirely surrounding each-recess and'inserts-of plastic friction material-impregnated with grit molded insaid recessesg; I

-4;.-A closure for a containerhavingexternal screw means, said closure comprising a unitary,- integral, molded cap having internal screw means to 'engage an-external screw means upon a container, said cap having a recess in its outer surface extending only partially around the periphery of the cap, integral walls entirely surrounding the recess,-and an insert of plastic friction material impregnated with. grit molded in said. recess. I

' MAX ,EWBAAR. 

